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In simple terms a rip
current is a strong, narrow stream of water that
usually originates at the beach and continues beyond
the breaking waves. In some cases rip currents may
end only 50 feet from shore but in extreme cases,
rip currents may extend over 300 feet from shore.
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A rip current is created as
a result of interactions between wind, waves, tides
and sometimes offshore storm events.
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A rip current is also
created in response to the ocean’s bottom topography
and the formation of sandbars. Sometimes a rip current is
caused by manmade objects extending into the surf zone, e.g. a pier or jetty.
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The strength varies
dramatically. In some cases a rip current can be
relatively slow and weak while in other cases, a rip
current may reach speeds of over eight feet per
second. This speed makes it impossible for even the
strongest swimmer to swim against. |
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Rip currents are sometimes
difficult to spot. However, with the aid of some
basic information and a little practice, even a lay
person can learn how to identify and avoid being
caught in a rip current. Some of the rip current
indicators include the following: |
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Choppy or “excited” water
that is located in a channel. |
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Flotsam (debris) usually
moving away from the beach. |
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Discolored or murky water
allowing for the identification of a distinct
channel (neck) that terminates offshore. |
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Rip currents are not to be
confused with rip tides. |
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Rip currents although
influenced by tidal action are not caused by tides.
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Rip tides on the other hand
are the result of tides and the egress and ingress
of large volumes of water flowing through inlets,
estuaries and bays. |
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Temporary rip currents are
the most common and may form on any beach. They are
usually short lived, but can be very dangerous. Some
temporary rip currents migrate down the beach in the
direction of the long shore current while other
temporary rip currents are ephemeral, quickly
forming and quickly dissipating. Sometimes these are
called “flash” rips. |
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Permanent rip currents are
usually associated with a manmade object such as a
pier or jetty and sometimes with naturally occurring
geological features such as channel in a coral reef. |
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